pelham



(No Model.) 2 Sheets-Sheet 1.

H. BAINES & A. E. PELHAM. SAFETY DEVICE FOR HOISTED GARRIAGES.

No. 595,987. Patented De0.21,1897.

ATTORNEYS.

WITNESSES n4: NORRIS #:Tzas co. FHOYO-LITHCL, wnsumcrou. u. c

(No Model.) 2 Sheets-Sheet 2. H. BAINES 8v A. E. PELHAM. SAFETY DEVICE FOR HOISTED UARRIAGES. No. 595,987.

Patented De0.21,1897.

wig/T055 9% v WITIVE88E8 ATTORNEYS.

mu EYER! w,mmammx. wnsnmsmu n c UNITED STATES PATE T OFFICE.

HUGH BAINES, OF BROOKLYN, AND ALPHONZO E. PELHAM, OF NEW YORK, N. Y.; SAID BAINES ASSIGNOR OF ONE-THIRD OF HIS RIGHT TO SAID PELI-IAM.

SAFETY DEVICE FOR HOISTED CARRIAG ES.

SPECIFICATION forming part of Letters Patent No. 595,987, dated December 21, 1897.

Application filed February 20, 1897. Serial No. 624,474. (No model.)

To all whom it may concern.-

Be it known that we, HUGH BAINES, engineer, a subject of the Queen of Great Britain, at present residing in Brooklyn, county of Kings, State of New York, and ALPHONZO E.

PELHAM, of New York city, county and State.

of New York, have invented a new and Improved Safety Device for Hoisted Carriages,

of which the following is a full, clear, and to exact description.

Our invention relates to hoisting devices or elevators, and has for its object to provide improvements in that class of elevators which have governors to control the speed of the descent, with a view of locking the elevator-carriage in place in case it travels too fast, or in case the governor gets out of order and fails to act, or in the event of the hoisting-cable breaking.

To this end ourinvention consists in a novel construction and arrangement of parts, as will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement. Fig. 2 is a sectional plan View of the same on the line 2 2 of Fig. 1. Fig. 3 is a transverse section of the improvement on the line 3 3 of Fig. 1. Fig. 4 is a similar view of the same on the line 4 4 of Fig. 1. Fig. 5 is a like view of the same on the line 5 5 of Fig. 1, and Fig. 6 is an end view of the improve- 3 5 ment.

On the top beam A of the carriage A are arranged longitudinally-extending shafts B B, journaled in suitable bearings G, secured to the top beam and formed with guideways O, engaging guides or tracks E, arranged in the elevator-shaft. On the outer ends of the shafts B and B are secured the clutches D D, respectively, normally held out of contact with the sides of the guides or tracks E,

but adapted to be thrown into firm contact with the guides to securely lock the carriage A at any desired point in case of accident, as hereinafter more fully described.

The clutch-shafts B and B are provided I with laterally-extending lugs B B respec- 5o tively adapted to be engaged by arms F and F, respectively secured on transversely-extending shafts F F, respectively provided with arms F F respectively connected loosely by links F F with bars G G, respectively fitted to slide longitudinally on grooved pulleys or rollers H H, respectively journaled in guideways H H secured to the top of the beam A and preferably slotted at the upper ends to permit the bars G G to swing upward, as hereinafter more fully described.

The outer ends of the bars G and G are adapted to move alternately in and out of engagement with a series of projections made, preferably, in the form of vertically-extend- 6 5 ing toothed or notched plates or racks I I, secured to the guides E or formed thereon, as plainly indicated in the drawings.

The inner ends of the bars G and G are pivotally connected with a wrist-pin J, secured on a gear-wheel J, forming part of the driving device for a governor K of any approved construction and supported on the top beam A of the carriage. The gear-wheel J receives its rotary motion from an intermediate gear-wheel L, in mesh with a gear-wheel L, in mesh with one of the plates or racks I, as shown in the drawings; but it is evident that other means may be employed for turning the said gear-wheel J by the up-and-down 8o movement of the carriage A.

Now it will be seen that when the gearwheel 'J is rotated the bars G and G are moved simultaneously in a longitudinal direction in such a manner that their outer ends alternately pass in and out of engagement with the fixed racks or plates-that is, when the bar G is out of engagement with the plate I then the other bar G is in engagement with the plate I, and vice versa. 0

In case the governor refuses to work, owing 'to the breaking of the gear-wheel L or L, and the wheel J remains stationary in consequence thereof, then one of the bars G or G is in engagement with the corresponding rack, 5 and consequently the said bar is not drawn out of said device by the action of the gearwheel J, but is forced upward during the descent of the cage Aby the corresponding rack, the said bar swinging on the wrist-pin J as its pivot, so that the corresponding link F or F is pulled upon and the arm F orF causes an oscillation of the corresponding shaft F or F to move the arm F or F downward against the lug B or B to impart a rocking motion to the corresponding shaft B orB, so as to throw the clutches D or D in engagement with the guides E.

As the shafts B and B are shown connected with each other by arms B and B and a pin B carried by the arm B and extending through a slot in the arm B as shown in Fig. 4, it is evident that whenever the shaft B or B receives a turning motion itimparts alike movement to the other shaft, so that all the clutches D and D simultaneously move in engagement with the guides or tracks E to lock the carriage in place.

In case the carriage Atravels too fast, then the governor causes an oscillation of the clutch-shafts B and B, to throw the clutches in contact with the guides to stop the carriage by the arrangement presently to be described.

The governor-stem K is provided with a collar K engaged by an arm N, secured on a laterally-extending shaft N, journaled in suitable bearings on the beam A. On the shaft N is arranged an arm N normallyheld under a lug O, projecting laterally from a lever O, fulcrumed at O onthe top of the beam A. A spring 0 pulls on the lever O in a downward direction, and the free end of this lever rests on the laterally-extendin g lug 13" of the shaft B. When the governor-balls fly outward and pull the governor-stem K upward, then a swinging motion is given by the collar K to the arm N, so that the shaft N is rocked and the arm N is moved from under the lug O. The lever O is thus freed, and the spring 0 now pulls the lever 0 downward to cause the free end thereof to press the lug B in a downward direction, so as to turn the shaft B and by the arms 13 B the shaft B to cause an application of all the clutches D D on the. guides or tracks E.

In order to apply the clutches in case the hoisting-cables P break, the following device is provided, special reference being had to Figs. 1 and 5.

The hoisting-cables P, which may be one or more, are connected with an eye Q, supporting on the lower end of its shank a disk Q, on which presses in a downward direction a spring R, held with its top in a cup S, formed on a bracket S, attached to the beam A. From the disk Q extend laterally the arms Q and Q adapted to engage lugs B 13, extending laterally from the shafts B and B, so that when the cables P break the spring R forces the disk Q downward to cause the arms Q and Q to press the lugs 13 B in a downward direction and turn both shafts B and Bto apply the clutches D and D on the guides E to stop the carriage.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. The combination of the elevator-shaft having guiding-surfaces and a stationary rack, the carriage having a bar movable into and out of engagement with the rack, mechanism located on the carriage and driven by the movement of the carriage, said mechanism being operatively connected to the said bar to move it in and out from one rack.- tooth to another during the normal movement of the car, and a clutch device connected to said bar and operated by the prolonged engagement thereof with the rack when said mechanism fails to act, said clutch device being adapted for engagement with the said guiding-surfaces of the elevator-shaft, substantially as described.

2. The carriage provided with a clutch device, a reciprocating or vibrating bar, mechanism connected to said bar and operated by the normal movement of the carriage for imparting a reciprocating motion to said bar,

and a connection between said bar and the clutch device to operate the latter when said mechanism fails to act, substantially as described.

3. The carriage provided with a movable part, mechanism connected to said part and operated by the normal movement of the carriage for imparting a step-by-step movement to said part, and a clutch device connected to said part and operated by the stoppage of the step-by-step movement when the said mechanism fails to act, substantially as described.

4. The carriage provided with a driving mechanism operated by the normal movement of the carriage, a bar or rod connected to said mechanism to receive a reciprocating motion therefrom, said bar being free to swing upwardly in case the driving mechanism fails to act, and a clutch device connected to said bar and operated by the upward swinging thereof, substantially as described.

5. The carriage provided with a driving mechanism operated by the normal movement of the carriage, bars connected to said mechanism to receive a reciprocating motion therefrom, one bar moving inward when the other moves outward, the bars being free to swing npwardlyin case the driving mechanism fails to retract them, and a clutch device connected to both bars and operated by the upward swinging of either bar, substantially as described.

6. The carriage provided with two reciprocating or vibrating bars extending in opposite directions and so connected that one moves outward when the other moves inward, mechanism for giving motion to said bars by the normal movement of the carriage, and a clutch device connected to said bars and operated by them when their reciprocating motion is stopped, substantially as described.

7. The combination of the elevator-guides and the stationary rack, with a carriage having a clutch device adapted to engage said guides, a reciprocating bar adapted to engage the rack-teeth successively by a stepwise motion during the normal travel of the carriage, mechanism for imparting a reciprocating motion to said bar, said mechanism being operated by the normal travel of the carriage, and a connection between the reciprocating bar and the clutch device to actuate the latter when the bar remains in prolonged engagement with a rack-tooth owing to the stoppage of the said mechanism, substantially as described.

8. The combination of the clutch, the clutch shaft having a crank-arm, the lever adapted t'o engage the said crank-arm, the movable bar, means forimparting a step-by-step movement to said bar by the travel of the car, the bar being also capable of an upward movement, and a connection between the bar and lever to actuate the clutch by the upward movement of the bar, substantially as described. t

HUGH .BAINES. ALPHONZO E. PELHAM.

Witnesses:

THEo. G. HOSTER, JNo. M. BITTER. 

